THANKS for all the help and suggestions. I'm actually reconsidering my original radiator setup plan.
New plan. I'm going to lay the radiator flat / horizontal and use the factory vents that take advantage of the low pressure system behind the car to draw air into the "engine compartment to cool the air cooled engine, but in my case it'll cool the radiator. Also, I'll build some ductwork to direct the airflow through the radiator and out of the underside of the car which, in my mind, will keep the hot air from the exhaust and engine out.
Lastly, if I find myself in need of a little more air flow to radiator I'll get some deck lid stand offs.
I'm thinking I might not need them because the later model vw deck lids have vents to increase air flow, or is it to let hot air out from the engine?
